Portable surface-finisher.



I. P. BUCHANAN.

PORTABLE SURFACE FINISHER.

APPLICATION FILED D130. 2o, 1911.

2 SHEETS-SHEET 2.

WIT/M8858 atented New. i2, w12.

' -a practical t'ool o VUNTTED STATES PATENT carica.

J'AFFBEY P. BUCHANAN, OF NEXVARK, NEW JERSEY.

PORTABLE SURFACE-FINISHER.

To all lwhom 'it my concern:

Be it known that I, JAFFBEY P. BU- CHANAN, a subject of the KingofGreat- Britain, and a resident of the city ot' Newark, 'county ofEssex, and State of New J erscy', have invented certain new and usetultmprovements in .Portable Surface-Finishers, set fort-h in the followingspecification.

This invention relates to portable machine tools and more particularlyto tools for removing or polishing surface portions of wooden, metallicand other objects. One of the pur oses thereof isto provide the abovecharacter which may be easily transported, expeditiously set upinoperative relation to the article to be worked, a'nd which may beaccurately adjusted both as to the height of the said' article and as tothe character of the work to be accomplished.

Further objects of the invention exist in the novel construction andcombination of the various parts of the apparatus, illustrativeembodiments of which are shown in the accompanying drawings, which forma part of this application, which are particularly described in thefollowing specification, in which like characters. designatecorrespondin parts, and in which,- A. l

Figure 1 is a side elevation of one embodiment of my invention showingthe tool carriage in the position it would occupy after having madeapproximately one-half of a complete cut; l" 1g. 2 is a plan view of thesame illustrating the position of the tool carriage relatively to. thetransverse frame, after a number of complete cuts and approximatelyone-half cut more have been made; Fig. 3 is a rear elevation showingparts in the same 'relative position as in Figs. 1 and 2; Fig. 4 is afragmentary plan view .of a. modilication of my invention; l F ig. 5 isa front elevation of the tool can" ringe and operating parts; Fig. is aside elevation of thc same. .and Fig. 7 is a {rac- I tional sideelevation showing the belt tightl @ning means.

Referring now in detail to the drawings, the apparatus consistsessentially ot' three parts.a portable base frame A which, in workingpoz-llion. is rigidly secured either directly or indirectly to the work;the transvcrse'frame B which movably supported and guided with a.transverse movement relatively to the work by the frame A; and the toolcarriage C movably supported and Specification of Letters Patent.

Application filed December 20, 1911. Serial No. 666,994.

Patented Nov. 12, 1912.

guided in the opposite transverse direction by the said traveling frameB.

The base frame A consists of a luralitg.7 of frame beams ot' suitablemateria shown as steel angle beams, joined one to another to form arectangular skeleton structure, two of the opposing parallel angle beams1 provide parallel tracks or trackways 2, 2 upon which the wheels of thetransverse traveling frame B roll. rlhis rectanofular frame A isprovided with several meniliers 3, (four being illustrated each adjacentthe corners), which have sockets formed therein in which leg screws 4are mounted. Each le screw 4 is thieaded into a tubular leg 5: uitablemeans is provided for relatively rotating the leg screws and legs forthe purpose of vertically adjusting the mounting of the frame A.' Thisrelative rotation may be accomplished in any suitable manner, handWheels G being illustrated for that purpose. Each of the tubular legs 5is preferably provided with suitable means, shown in the form of a scalefor indicating degree 'of adjustment. In the embodiment shown a narrowslot 7 extends longitudinally of the leg, -the margin of which slot isdivided oil' into a scale 8. The nger or pointer 9 is shown looselyassociated with the end of each screw 4 and extending out of the slot 7to coperate with the scale 8.

Suitable means is provided for rigidly clamping the frame Apto the work.In the embodiments illustrated the clamp screws 10 are. suitably mountedin the beams 1. Each screw 10 is shown fitted with a hand-wheel 11 tofacilitate its manipulation and with a loosely attached tlattened piece12 to abut against the side of the work or Work supporting table 13,whereby the same may be clamped rigidly to the frame A. Y The work beingoperated upon as illustrated in the drawings is a butchers choppingblock. but it is 'shown merely for the purpose of illustration, the toolbeing suitable for operation upon various kinds of work.

ln the modification shown in'Fig. el the clampingr screws 10 are shownfitted at their ends with extension blocks 14 suitably shaped inconformitv with the cylindrical piece of work therein shown and of asize.

to adapt the .trame to smaller pieces of work than that illustrated inFigs. 1, 2 and 3.

It. is, of course, to be understood that vari-I cus extensions of thischaractersuitable for articles o f various shapes and sizes are con@templated. The transverse or traveling frame B is also rectangular inform and of a length corresponding to the width ot the base trame it butconsiderably narrower than the length of the base frame. This frame B isconstructed of framed beams l5, and i6, 16 of suitable material andshown steel angle beams. The two longA beams t5, '1.5 provide a suitableguide-way for the base plate of the tool carriage C for the same to movein a direction at right angles to the movelnentot the. traveling trame Pitself. ln the embodiment illustrated the vertu l, flanges of the anglebeams serve as contimngmeans for the tool carriage (l.

Secured in the short sides in the frame B are sdlbs 17 upon Wluch.th`egrooved wheels lb" are rotatably" mounted, thegrooves ot thesaid wheelsbeing of suitable torni to receive the vertical Hangers .2-l of theangle beams i--l all of the frame A'.

The tool carriage (l comprises a baseplate 19v Which-fits snugly butslidably between pmallel flanges of the'beains' l5, l5 and, si'ipportedthereon, is the driving motor 20. Secured to the underside of thebase-plate i9 are; the bearings 21 within which isjournaled the toolshaft Q2. Suitable means for difivi'g this tool-shaft from the motor Q()is provided. In the embodiment illustrated this means comprises a pulley23 on the end of the tolpshatt Q2 driven by the motor Z0 through themedium 'of its pulley 24 and the belt The opposite end of the tool shaft221s formed to receive the op n'atii1g tool 26 which may'be a polishing,abrading or cutting tool as illustrated. rThis tool is shown held inworking position by the nut 27.

f Upon the lower side of the base-plate 19 and adjacent the rearedgethereof are a plurality of bearing or supporting plugs 28 adaptedtio-rest slidably upon therear angle beam l5 and to support the rearportion of the 'tool carriage thereon. Suitable means for adjusting. theelevation ot the working 'tool-26 is provided. ln theembodimentillustrated this means comprises a pair of adjusting screws Q9threaded through the base-'plate 19 along the front edge thereof so thattheir ends engage the forward angle beam l5. Located between the saidscrews and 'secured to the base-plate lil-is a scale member 30. Suitablemeans is provided for indicating through the medium of the scale member30 the` vertical adjustment of the aforesaid screws 29. This means is'shown in the form ot pointers 31, one loosely7 supported by eachadjusting screw and relatively, immovable longitudinally thereof. Eachpointer is forked atits end so as to straddle the edge of the said scalemember 30, whereby the pointer is prevented from turning with the screa729. A slight but -suic'ient horizontal adjustment may also. be

effected by the screws 29 to incline the baseplate, by screwing` onescrew 29 lower than the other. This adjustment may be desirable forsetting the cutting edge of'the tool with greater precision. Means isalso shown t'or the purpose of tightening the driving belt This meanscomprises a novel mounting 'for the motor 20. The rear foot or Jfeet ofthe motor are provided with a halt round strip 32 to serve as thebearing upon the base plate 15), while the said feet are held down bythe holding` down screw 33. Adjusting screws H4 threaded through thebase plate lil engage the trout toot. 35 ol' the motor to adjust the.same to various elevations, the motor tilting or hinging on the haltroun lstrip-32 lwhen the screws 34- are uuinipulated. The frontitoot ofthe motor held down and set in lposition by the holding` down screw 36.

From the foregoing, the operation of my portable tool-mill be largelyobvious but, as

conducing to a clearer understanding therel ot', it may here benotedthat when itl is desired to perform Work, such as t-he squaring upof the surface of a butchers'block, the base frame A is set upsurrounding the block `and the height thereof adjusted by turning thehandwheels or other means in the legs. It' the trimmed surface is to betrue with the floor the indicators on the legs are set at tlie sameheight but it the floor is sloping or uneven the legs are then adjustedto render the frame true to the horizontal or to effect. any desiredangle. The centering screws 10 are then set up, extension blocks beingused if necessary, whereby the base `trame and work are rigidly heldtogether. The transverseor traveling frame B is then placed on the baseframe A and thc tool carriage is set in its proper position th'ereon.The electrical connections having been made to the motor, the travelingframe and tool carriage are moved to and froover the surface of theblock and adjusted by the screws 29 until the cutter Qil; just touchesthe highest point of the block. The traveling frame is the-n broughtback to its limit of travel and the tool carriage moved transversely toits left' 'the work the tool carriage is lowered by means of the screws2S) to give the desired depth of cut and this adjustment may b eaccurately made by noting the position of the indicators 3l upon thescale 30. The motor ifow beingstarted and the traveling frame pushedtoward the front of the base frame, the cutter travels in a straightline and removes all of the material in its path, to the desired depth.Having finished its cut it is returned to the back of the machine by theoperatorJ and the tool carriage is then moved transversely upon theframe B, a distance equal to the width of the cutter. These, two

.operations are then repeatedA as often as is of a. second frame mountedelectro-motor and said surface of l scribed, the combination with a.rigid rectanguiar portable frame adapted to surround pieces of work ofvarious and irregular outsaid frame plurality of legs,

planing tools but 4is also adapted for the each. or" said legs beingoperation of a grinding or polishing tool, all adjust-able 'forcoperating to support said denoted generically by' the term workingframe in a horizontal or an inclined posi tool. tion, and meansadjustable relatively to said l-Vhatis claimed and what is desired to besecured by United States Letters Patent is i u'lar outline of a 1. In anapparatus of the character detraute scribed, the combination with a.rigid reetanframe; gular portable frame adapted to surround a piece ofWork, said frame having adjustable supports for supporting said frame ina horizontal4 or an 'inclined means adjustable relatively. to clampingsaid frame to said piece of work; of a second mounted to travel uponsaid lirst a tool carriage slidably mounted upon said second frame;.anoperating tool carried by said carriage; an electro-motor carried bysaid carriage,r adjustable means position, and between said carriage.and said second frame said frame for whereby said carriage may beinclined relapiece of Work; .to travel u on said first frame; a toolcarriage sliday ly l said mounted upon sa'id second frame,- an open lmeans between said electro-motor and said ating tool carried bysaidcarriage; an elecj operating tool; and means operative bel said carriagevertically relal for adjusting said electro-motor relative to saidcarriage to adjust said power transmission means.

between' said In Witness whereof, I have signed my operating tool; a'ndnaine to this speeioation, in the presence of means operative betweensaid'electro-motoi" two subscribing witnesses. A 1

il position of said operating tool relatively to second fra-me; powertransmission power transmission means and said carriage for Vadjusting'said electro? J AFFREY P. BUCHANAN. motor relative to said carriage toadjust 'said g Witnesses: power transmission means. CHARLES J. KIERAN,

2. In 'an apparatus ,of the'charac'ter del BLANCHE BUCHANAN.

l tively to said second frame for adjusting' the fre-mejor clamping saidframe to the irreg-

